Automobile-horn.



W. B. STEPHENS.

AUTOMOBILE HORN.

APPLICATION FILED JULY 14, 1911.

1 ,036,023. Patented Aug. 20, 1912.

WjZn/euww Mew" @zw/zw g mmiwwxzw iww UN STATES PATENT OFFICE.

WILLIAM'EDWARD STEPHENS, OF CHICAGO, ILLINOIS, ASSIGNOR TO AERMOREMANUFACTURING COMPANY, OF CHICAGO, ILLINOIS.

AUTOMOBILE-HORN.

Specification of Letters Patent.

Patented Aug. 20, 1912.

- To all whom it may concern and State of Illinois, have invented newand f useful Improvements in Automobile-Horns, -"l= Pof which thefollowing is a full, clear, and 1 exact description.

My inventionrelates to warning horns or signals, and is particularlydesigned for use in connection with automobiles, motorcycles, and thelike, and is adapted to be connected to the exhaust of the enginethereof and is operated by the pressure of the expelled gases therefrom.

It is the object of my invention to construct a signal horn of thischaracter that can be easily applied, that will not be affected by thehot blast to which it is subject, that is simple and durable inconstruction, and easily assembled, and that produces a pleasingresonant musical chord and never shrieks or hisses. These objects Iaccom- 'plish by the means and in the manner hereinafter fully describedand as more particularly pointed out'in. the claims, reference being hadto. the accompanying drawings forming a part hereof, in which Figure 1is a longitudinal side elevation of my improved horn or signal. Fig. 2is a central longitudinal section through a portion of the coupling-headand showing the core in elevation. Fig. 3 is a transverse verticalsection taken on line 3-3 Fig. 1. Fig. 4 is'a detail perspective view ofone of the washers used in assembling the parts of the horn.

Referring to the drawings, A is a suitable cast metal coupler or headthat is preferably cylindrical or cup-shaped and is threadedinterior-1y. The coupler is adapted to be screwed onto or otherwisesecured to the end of the mufller or other exhaust port of the engine.of an automobile (not shown). The

closed end of this coupler has a central or axial stub B extendingbeyond the same. .A plurality of nozzles C, C, are tapped into theshoulder between said stub and the outer circumference of the couplerand project obliquely outward beyond the same a suitable distance, andhave their outer or discharge 1, ends D preferablyflattened and extendedinto the adjacent open end of the respective resonant tubes. Stub B ispreferably bored out from its outer end to the interior of the couplingand has the adjacent screw-threaded end of a stem or spindle E tappedinto the same, preferably in axial alinement with the coupling. Thisstem is preferably about half the length of the longest resonant tubeand at its outer end is provided with a rectangular shaped head F, thesides of which are preferably concaved. A similar head G is formed onthis stem at a point immediately beyond the outer end'. of the stub B,and adjacent to this last mentioned head (G), said stem is provided,with a circumferential flange H, substantially as shown.

The resonant tubes I, I are made of metallic tubing, preferably of thesame diameter but of various lengths in order to produce notes ofvarious pitches. These tubes are placed in the seats formed by theconcaved edge portions of heads F and G, and are secured in position bytapping suitable screws through the same and into the boss' H on thecentral stem. Suitable washers J are interposed between the heads ofscrews k and the interior of the tubes and the sides thereof engagingthe tubes are oonvexed so as to contact with the same throughout. theirlengths, while suitable ridges j are formed on their upper outer endsthat prevent the displacement of the nozzles in case of accident. Thenozzles C projecting into these tubes are preferably longer or shorteraccording to the length of the respective tube engaged thereby. Near thedischarge end of these nozzles, the side-walls of the resonant tubesopposite the stem are preferably cut away to form openings K, and thisis done by cutting a T-shaped slit in the end edge of said tube andbending the wings L, L, formed thereby, outward, as shown. Thetransverse edge of the cylindrical portion of each tube, betwetn itswings, is preferably flattened so as to make it straight, and thecurrents of exhaust gases fromthe muiiier impinge against this edge M asthey pass out of the nozzles, and sound a note of a different pitch in'each tube. I

By the arrangement above described, while the tubes are closed on theirouter ends, their inner ends are open and free and it has been foundthat, no matter how high may be the pressure of the exhaust, the tone ofeach will be uniform and pleasant to hear: and the chord resulting fromthe combined resonant tubes, while. pleasant to the ear, willbesufliciently violent to alarm and warn pedestrians and others of theapproach of the vehicle carrying the same.

While I have described and shown a par ticular arrangement and number ofparts it of course is obvious that the same may be varied according tothe needs of particularcases, and all such modifications are to beunderstood as contemplated within the scope of my claims. I

What I claim as new is:

1 A horn comprising a series of longiv tudinally disposed resonanttubes, 'a'longitu'dinally disposed central 'stem around which the tubesare grouped which is providedwith openconcave seats for the same,a'tubula'rcoupling to one end of which said stem is secured, and aseries of air nozzles or tips secured to and leading from said coupling,which discharge into the open ends of said tubes.

2. A horn comprising a series of longitudinally, disposed resonant tubesof various lengths whose open ends are in the same transverse plane, alongitudinally disposed central stem around which said tubes aregrouped, a boss-mounted-on said stem, screws tapped through the innerportion of the shell of each tube into said boss, longitudinallyelongated .washers interposed be tween the heads of said screws and saidshells each having a transverse ridge across its outer edge, a tubularcoupling into the closed end of which oneend of sald stem is" secured,and a series of airnozzles or tips which discharge into the open ends ofsaid tubes.

3 A- hprn comprising a series of longiinterposed between the heads ofsaid screwslehgths whose open ends'are in the same and saidshells' thathave-transverse ridges across their outer edges. a tubular couplm intothe closed end of which one end' of sat stem is secured, and a series ofair nozzles or tips which discharge into the open ends of said tubes. Iv v 4. A horn comprising a coupling member having a singleintake'lopening or bore and several obliquely extending dischargeopenings at'its opposite end, and a cluster of resonant tubes ofdifferent lengths rigidly supported by said coupling and arrangedsubstantially concentric to the axis thereof,

and having the side-walls of their open ends adjacent to said coupling,into which said openings discharge, cut-away and having their oppositeends closed.

In witness whereof I have hereunto set my hand this 11th day of July,1911.

WILLIAM EDWARD STEPHENS.

lVitnesses:

K. LUNDY, Ms- F. J ILLSON.

